438470172 has 84 divisors (see below), whose sum is σ = 1314870256. Its totient is φ = 125271360.

The previous prime is 438470161. The next prime is 438470173. The reversal of 438470172 is 271074834.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438470173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 9672 + ... + 31152.

Almost surely, 2^438470172 is an apocalyptic number.

438470172 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438470172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657435128).

438470172 is an abundant number, since it is smaller than the sum of its proper divisors (876400084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438470172 is a wasteful number, since it uses less digits than its factorization.

438470172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21510 (or 21493 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 438470172 is about 20939.6793671727. The cubic root of 438470172 is about 759.7079741393.

The spelling of 438470172 in words is "four hundred thirty-eight million, four hundred seventy thousand, one hundred seventy-two".